<html>
<body>
<form id="form1">
  <input type="text" id="input5" value="input5 from form3" tabindex="2"><br>
  <div id="contenteditable4" contenteditable="true" tabindex="3">contenteditable4 from form3</div><br>
  <a href="#" id="anchor3" tabindex="4">anchor3 from form3</a><br>
  <textarea id="textarea6" tabindex="1">textarea6 from form3</textarea><br>
  <div id="contenteditable5" contenteditable="true" tabindex="-1">contenteditable5 from form3, but not considered for navigation due to invalid tabindex</div><br>
  <input type="text" id="input6" value="input6 from form3" tabindex="5"><br>
</form>
</body>
</html>
